Naoshima, Japan offers 1 beach perfect for sunbathing, surfing, swimming, and more. Naoshima is known for its contemporary art museums, including the Benesse House and Chichu Art Museum. The best time to visit Naoshima, Japan, is in April or October, when the average air temperature is around 18°C (64°F) and the water temperature is approximately 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!